content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.flowable.internal.operators;
  
  import static org.junit.Assert.*;
  
  import java.util.concurrent.Callable;
  
  import org.junit.Test;
  import org.reactivestreams.*;
  
  import io.reactivex.common.*;
  import io.reactivex.common.exceptions.TestException;
  import io.reactivex.common.functions.Function;
  import io.reactivex.flowable.Flowable;
  import io.reactivex.flowable.internal.subscriptions.*;
  import io.reactivex.flowable.subscribers.TestSubscriber;
  
  public class FlowableScalarXMapTest {
  
      @Test
      public void utilityClass() {
          TestCommonHelper.checkUtilityClass(FlowableScalarXMap.class);
      }
  
      static final class CallablePublisher implements Publisher<Integer>, Callable<Integer> {
          @Override
          public void subscribe(Subscriber<? super Integer> s) {
              EmptySubscription.error(new TestException(), s);
          }
  
          @Override
          public Integer call() throws Exception {
              throw new TestException();
          }
      }
  
      static final class EmptyCallablePublisher implements Publisher<Integer>, Callable<Integer> {
          @Override
          public void subscribe(Subscriber<? super Integer> s) {
              EmptySubscription.complete(s);
          }
  
          @Override
          public Integer call() throws Exception {
              return null;
          }
      }
  
      static final class OneCallablePublisher implements Publisher<Integer>, Callable<Integer> {
          @Override
          public void subscribe(Subscriber<? super Integer> s) {
              s.onSubscribe(new ScalarSubscription<Integer>(s, 1));
          }
  
          @Override
          public Integer call() throws Exception {
              return 1;
          }
      }
  
      @Test
      public void tryScalarXMap() {
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
          assertTrue(FlowableScalarXMap.tryScalarXMapSubscribe(new CallablePublisher(), ts, new Function<Integer, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Integer f) throws Exception {
                  return Flowable.just(1);
              }
          }));
  
          ts.assertFailure(TestException.class);
      }
  
      @Test
      public void emptyXMap() {
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
  
          assertTrue(FlowableScalarXMap.tryScalarXMapSubscribe(new EmptyCallablePublisher(), ts, new Function<Integer, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Integer f) throws Exception {
                  return Flowable.just(1);
              }
          }));
  
          ts.assertResult();
      }
  
      @Test
      public void mapperCrashes() {
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
  
          assertTrue(FlowableScalarXMap.tryScalarXMapSubscribe(new OneCallablePublisher(), ts, new Function<Integer, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Integer f) throws Exception {
                  throw new TestException();
              }
          }));
  
          ts.assertFailure(TestException.class);
      }
  
      @Test
      public void mapperToJust() {
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
  
          assertTrue(FlowableScalarXMap.tryScalarXMapSubscribe(new OneCallablePublisher(), ts, new Function<Integer, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Integer f) throws Exception {
                  return Flowable.just(1);
              }
          }));
  
          ts.assertResult(1);
      }
  
      @Test
      public void mapperToEmpty() {
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
  
          assertTrue(FlowableScalarXMap.tryScalarXMapSubscribe(new OneCallablePublisher(), ts, new Function<Integer, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Integer f) throws Exception {
                  return Flowable.empty();
              }
          }));
  
          ts.assertResult();
      }
  
      @Test
      public void mapperToCrashingCallable() {
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
  
          assertTrue(FlowableScalarXMap.tryScalarXMapSubscribe(new OneCallablePublisher(), ts, new Function<Integer, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Integer f) throws Exception {
                  return new CallablePublisher();
              }
          }));
  
          ts.assertFailure(TestException.class);
      }
  
      @Test
      public void scalarMapToEmpty() {
          FlowableScalarXMap.scalarXMap(1, new Function<Integer, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Integer v) throws Exception {
                  return Flowable.empty();
              }
          })
          .test()
          .assertResult();
      }
  
      @Test
      public void scalarMapToCrashingCallable() {
          FlowableScalarXMap.scalarXMap(1, new Function<Integer, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Integer v) throws Exception {
                  return new CallablePublisher();
              }
          })
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void scalarDisposableStateCheck() {
          TestSubscriber<Integer> to = new TestSubscriber<Integer>();
          ScalarSubscription<Integer> sd = new ScalarSubscription<Integer>(to, 1);
          to.onSubscribe(sd);
  
          assertFalse(sd.isCancelled());
  
          assertTrue(sd.isEmpty());
  
          sd.request(1);
  
          assertFalse(sd.isCancelled());
  
          assertTrue(sd.isEmpty());
  
          to.assertResult(1);
  
          try {
              sd.offer(1);
              fail("Should have thrown");
          } catch (UnsupportedOperationException ex) {
              // expected
          }
      }
  
      @Test
      public void scalarDisposableRunDisposeRace() {
          for (int i = 0; i < 500; i++) {
              TestSubscriber<Integer> to = new TestSubscriber<Integer>();
              final ScalarSubscription<Integer> sd = new ScalarSubscription<Integer>(to, 1);
              to.onSubscribe(sd);
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      sd.request(1);
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      sd.cancel();
                  }
              };
  
              TestCommonHelper.race(r1, r2, Schedulers.single());
          }
      }
  
      @Test
      public void cancelled() {
          ScalarSubscription<Integer> scalar = new ScalarSubscription<Integer>(new TestSubscriber<Integer>(), 1);
  
          assertFalse(scalar.isCancelled());
  
          scalar.cancel();
  
          assertTrue(scalar.isCancelled());
      }
  }
  